Manufacture of split rings.



J. 81 E. L. ETTLINGER.

MANUFACTURE OF SPLIT RINGS. APPLICATION FILED JAN 2. 1914 1,158,376. Patented Oct. 26, 1915.

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WITNESSES.

NVENTUQE ATTORNEY.

J. & E. L. ETTLINGER.

MANUFACTURE OF SPLIT RINGS.

APPLICATION FILED JAN. 2. 1914.

Patented Oct. 26, 1915.

2 SHEETS-SHEET 2.

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WITNESSES.

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JOSEPH ETTLINGER, CRANSTON, AND EDWARD L. ETTLINGEE, 0F PROVIDENCE, RHODE ISLAND; SAID EDWARD I. ETTLINGER ASSIGNOR TO FREDERICK ETTLINGER,

or PROVIDENCE, RHODE ISLAND.

MANUFACTURE O13 SPLIT RINGS.

iasseve.

Specification of Letters Patent.

Patented Uct. 26, 1915.

Application filed January 2, 1914. Serial-No. 809,881.

To all whom it may concern: 7

Be it known that we,fJosnrn ETTLINGER and EDWARD L. ETTLINGER, both citizens of the United States, residing, respectively, at Cransto-n and Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in the Manufacture of Split Rings, of which the following is a specification.

Our invention relates to the manufacture of finger rings of that type wherein a portion of the body is longitudinally. pierced and thereafter expanded to form spaced longitudinally extended portions adapted to receive any desired ornament. It has hitherto been deemed essential in the manufacture of this type of ring to pierce and expand an intermediate portion of a straight ring blank, and thereafter bend the blank into an annulus over some suitable tool and bring the free ends of the blank into contact with each other. The described method is expensive, and because of the weakness of the stock along the pierced portion of the blank, the ring could not be bent in a true circle at that point, but tended to form an angle.

The essential objects of our invention are to overcome the recited disadvantages; to employ certain steps in the process of manufacture of rings that will strengthen the structure and simplify-and cheapen the method.

To the above ends primarily our invention consists in such steps and combinations of steps as fall within the scope of the ap pended claims.

In. the accompanying drawings which form a part of this specification, Figure 1 is a, front elevation of the cutting or piercing tool, and a transverse section of the base die, of a device which may be used in connection with our invention, Fig. 2, a side elevation of the plunger or piercing tool, and a section of the base tool taken on a line 90 from the section of Fig. 1, Fig. 3, a front elevation of a modified form of the tools shown in Fig. 1, partially in section on line a: 00 of Fig. l, Fig. 4, a side elevation of the same partially in section, Fig. 5, an unbent ring blank, Fig. 6, a perspective view of a second form of ring blank and its tube, Figs. 7 and 8 plan views of the origi* nal and pierced ring blanks, respectively,

a transverse section of a cooperating mem- 'ber, Fig. 10, a side elevation and longitudinal sections, respectively of the same, F 11, a longitudinal section of one member, showing the plunger in engagement therewith, Fig. 12, a plan of the completed ring, and Fig. 18, a plan of the modified form of ring.

Like reference characters indicate like parts throughout the views.

In carrying out our invention we employ a complete annular blank A preferably half round or convex in cross-section, as shown in Fig. 7. This blank is formed either by bending a straight piece of stock, as A, shown in Fig. 5, or by cutting an integral annular blank A, as a section from a tube A. shown in Fig. 6. The ring A shown in F 7 first has its body pierced longitudinally some distance by suitable tools, forming an oblong slot or slit a, as shown in Fig. 8. By suitable tools the portions of the ring a a at each side of the slot a are expanded orspread from each other forming lateral arcuate portions or arms as shown in Figs. 12 and 13. I In Fig. 13 these arms are identified as M, and, difier from the corresponding portions shown in Fig. 12 merely in degree. For performing these steps. the following novel mechanism may be employed: A. movable piercing tool B is adapted to be fixed by a set screw 5 in the plunger C of the foot press or other similar reciprocating press or machine. The piercing tool B has an off set portion or arm D terminating in a broad cutter point (Z. The relatively stationary die E rests upon the table 6 of the press, and is provided with a cavity F in its upper face in vertical alinement with the point cl of the member B. An oblong recess f extends downwardly from the cavity F and is expanded to form an opening f completely through the die or block E. The cutter point (Z conforms in dimensions with the recess f and is adapted to receive the lower portion of the cutter'blade (Z when the latter descends in its reciprocation. The described piercing or 'cuttingtools are shown in operation upon a ring in Figs. 1 and 2. The descent of the tool B cuts the slit or slot at in the ring.

Another form of piercing tool which may convenient manner, is in the present instance removably mounted in a block E wherein 1t is retained byv set screws G.

- It will be observed that the movable tool shown'iuFig. 2, operates to cut the slot from the inner face of the ring, whilein Fig. 4 theringrr, which is suspended in the cavity F, is pierced from the outside of the ring. It has been found that rings of a large are are better adapted to the operation of the tools shown in Fig. 2 than they are to the tools shown in Fig. l, and vice versa.

Convenient toolsfor performing the expanding operation are shown in Figs. 9 to 11 inclusive and comprise a'movable tool H provided with a conical point It. This co- I operates with the cylindrical die I fixed in an opening 2' in a block E by set screws G or otherwise; The block E rests upon the table 6. The die member I is hollow, having closed end walls 2' and i. Slidably mounted in the diemembcr are two blocks K and L,

whose adjacent ends are normally held against each other by a helical spring Z in 7 one endof the member I having its extremities pressing against the Walls iand the face K,- and by a spring M in the other end of: the member I having one extremity pressing against.tl1e wall a", and its other extremity against the block L. At the point of contact of the blocks K and L the memher I is provided with an annular groove on,

adapted to receive the ring A, which groove is broadened at a point directly beneath the tool it into an enlarged substantially circular position shown in Fig. 11, thereby expanding the portions (11, of the ring, as the tool passes through the slit in the ring and intermediate the yielding members 1i and L. After the spreading operation the ring is removed from the member I where it has iinparted to it a form similar to that shown in Fig. 12. Obviously by changing the shape of the opening N and the shape of the tool /l, the laterally extending portions of the ring may be changed to any preferred design such for instance as that shown in Fig. 13.

What we claim is,

l. The process of making. split rings consisting in forming a longitudinally disposed slot in an endless ring to form spaced sec 'tions, and then transversely bending the sections into oppositely curved laterally extending arcuate arms integral with the ring at both their ends.

2. The process of making split rings, consisting in first forming a circular ring, next piercing a longitudinally disposed oblong slot through the ring to produce parallel spaced sections, and finally laterally expanding the spaced sections.

In testimony whereof we have ailixed our signatures in presence of two witnesses.

JOSEPH ETTLINGER. EDWARD L. ETTLINGIGR. lVitnesses:

HORATIO E. BnLLows, CHARLES S. JENGKES.

Copies of this patent may be obtained for five. cents each, by addressing the Commissioner of Patents. Washington, D. C. 

